Electrical condenser



" "alzo Painted' Jua 19, 1932 i? lumTED ys,.mT1535' vWWEN'r orifice emmer .warmen rrciunnvor .isniw'rc'n` 'Massaonusn'rrs assronon. .3y -msmx asswimmers, fro aman, Enggfnr mm, ngonAnon Naw-Yoan@ irtnpzrriarcax. commessa f l'smilioatlqniy tied November 33,1987.' Srie!" No. $85,134.

. The invention relates in general to electric condensers, and more particularly to series section type electric condensers and to methods and apparatus for making the same.

" 'e5 One method embodying the invention may comprise unrolling a plurality of single strip rolls .of-dielectric and foil alternately dis- 'i posed and then rolling the alternate layers of foil and dielectric upon a suitable mandrel tube inl a suitable rolling machine. Before rolling on the mandrel the foil layers ma be cut to orm spacedplates, adjacent foi llayers having their plates staggered tov n rovide 4the proper relation therebetween. 15 inner endplates ma be connected-thereto for-one terminal of the condenser. A metal tube may bev provided around the finished roll and the outer end plates of the condenser connected thereto for the other terminal of the condenser.v If desired, the'` layers may be rolled slightly helically toform a con denser roll having conical ends to increase the distance between terminals. insulation may be placed at the ends and in .the innerand outer tubes, or, if desired, the mandrel tube may be-left unilled to provide 'a coolingl opening through the condenser. 1 Another method of tion may com rise providing alternate layers of foil and ielectric, each foil layer comprising a plurality of foil strips laid side by side in spaced relation. Adjacent foil layers have the spacings-between ,stri s staggered to provide the roper relation tween con denser plates. he'stackof alternate layers of foil and dielectric maybe wound in the directionof the length of the foil strips upon asuitable mandrel mtoa roll condenser and caps may be provided on opposite ends of the rol .to whichthe end plates may be con nected to rovide terminals on opposite ends. If5desir he' condenser may-.Abe mounted in clips engaging the caps on opposite ends in a manner similar to the mountingof the ordinary cartridge fuse. f i

Onetype of mechanism for-performing the methods of invention may comprise suitable winding apparatus for rollin the layerslfifdeleotefandsieiilfinto a roliand he mandrel may be made of metaland the Suitable suitable cutting devices to.` form the separate y' plates, if necessary. Suitable devices may be rovidedjfor shifting the roll axially, as it isbeing. wound, to providethe conical ends on the condenser as above described.-

The invention also consistsin certain new and original features of construction and combinations of parte hereinafter: set forth and claimed. l

rvAlti-rough .the novel features which are 'bei .Q lievedto be characteristicy of this invention -wildbe particularly pointed out in the claims appended hereto, the invention itself, as to its obJects and advantages. the mode of its operationand the manner'of its organization may be-better understood'by referring to the fol` lowing description taken in connection with the accompanyingdrawingsforming a part thereof, in 'which v 1 Fig-l 1 represents, diagrammatically, a lde- .10

`form of finished condenser practicing the inven- Fig.; 5 -is a longitudinal section through another form of finished condenser;

Fig. 6v illustrates a modified form of condenser and a modified methodof making it;

Figi. 'i'` represents diagrammatically a paratus for performing the modified metod; an '1' o y Fig. 8 is an elevation partly in sectioncf a condenser made by the modified method 4illustrx's'ted ini Figs. 6 and 7 vIn ythe lfollowing description and in the claims 4parte` will bey identified by specific names for convenience, but they are intended to bees generic in their application 'to similar arts as'the art will permit.

Like reference characters denote likeparts the several `figures of the drawinlgs.

Referring more particularly to ig. 1, the condenser .shown is made up yof a plurality of secticns.A,B-, C, D, E, F, G and H.l The condensiervis formed lby alternate layers of didaoeaefhvins/...lnterreed l; similarly the end plates on the other end are connected together by a common conductor 2. It will be seen that each section B, C, etc., comprises one-half of alternate condenser plates 8, 9 and l() and one-half of the area of the interposed condenser plates 6 and The disposition of the plates or lloating relation automatically places the sections in series relation.

In order to make the condenser shown in Fig. 1, a condenser rolling machine is provided made up of a suitable framework K.

A shaft J having a spline J1 is vjournalled in arms of the frame K. A drive pulley P having a. driving belt has feather' keyway engagement with the shaft J and is mounted between arms of the frame K. Similarly a sprocket wheel L having feather keyway engagement with the 'shaft J is 1mounted between arms of framework K.

A second sprocket L2 is mounted on shaft byv a chain L1 riding on both sprockets L and L2.- A drive screw O is journalled in the frame K and is driven by the sprocket L2 through suitable gears N.

. A suitable yoke I is provided having arms Il and I2. The shaft J extends through the arm I2 and has a drum J2 mounted on thel end thereof. A collar J4 holds the arm I2 between it and the drum J2. The arm I1 has a tail stock I4 mounted therein. A mandrel II which ,is to -form the inside terminal of the finished condenser and having a bind- V ing post .'I, is mounted between the tail stock I4 :mdf-the drum J2, the d J2 having projections J3 for engagingi slots H2 (Fig. 4) to drive the mandrel H. -I'fThe yoke I has a sleeve I3 slidably mounted on the screw O and a pair of ears I5 between which is mounted a nut member I6 having a threaded nut portion I7 adapted to engage the screw O.

It will be seen that, as the drive pulley P drives the shaft J, the mandrel H will rotate andl at the same time thel screw O will .cause the yoke I to move axially of the frame K pulling both the spline shaft J and mandrel H therewith.

To make the condenser shown in Fig. 4 alternate rolls of dielectric Mare disposed as shown in Fig. 2. Between the rolls M are mounted rolls ofl foil F. The strips on all rolls are led to the mandrel where the ends of the foil F are conductively secured together and conductively secured to the mandrel H by conductor 1.

In order to cut the foil into plates, suitable cutting mechanisms made up of cutting members S or S1 and plate members G are provided in the path of each of the foil layers.

Suitable guide rolls R1 and R2 are provided for combining a layer of dielectric a layer of foil and suitable rolls R3 are provided to guide the dielectric away from the cutting mechanisms S, G and S1, G. Suitable rolls R5 are provided for combining the dielectric and metal layers after the latter have been cut. vSuitable rolls R4 are provided for guiding the foil on the cutting mechanism, these rollers being driven by chain SC from the rolls B1 which in turn are driven by the pull of the dielectric strip. It will be seen that alternate knives S and S1 cut their respective foil strips alternately to provide the alternate spacings between plates in the different layers of foil. As shown in Fig. 2 of the drawings the knives S and S are located substantially equi-distantl'y from the winding `mandrel so that it will be apparent that these knives must be timed diiferently in order thatt-he alternate foils have the staggered relationship called for. This is why the knives Sv are all shown in one part in their travel, while the knives S are shown in a different part of their travel. Any custom- A,ary mechanism for attaining the desired tim L3 journalled in the frame K and is driven ingof the knives may be used, and the specific mechanism to accomplish this purpose constitutesno part of this invention.

A suitable pressure wheel Q, is journalied at the end of a pressure arm, a spring Z beiner provided for holding the pressure whee against the condenser as it is being rolled on the mandrel, to aid in winding the condenser v'ery tightly, thereby preventing displacing a` dielectric medium in series with the foil layers. lAfter the condenser is wound, an outer metal casing V may be slipped over the roll, the outer ends of the foil layers being connected to the casing V by conductor 2. If desired, suitable insulation such as arain or asphalturn W may be provided to ll the en tire casing V, an insulating cover P being -provided to close the casing. It will be seen that one terminal T is secured to the mandrel H and the` other terminal Tl is secured to the casin V. f

If desired in the process illustrated in Figs. 2 and 3, a mandrel having the form H1 as shown in Fig. 5 ma be used to make a slightly modified'form o condenser. In this form, the mandrel is left hollow to secure'better cooling action. The casing V in this modification has its ends bent inwardly to form arc gaps with the mandrel I-Il. The casing V -is connected to the outside end plates by conductor 2 and the mandrel H1 is connected to the inside end plates by conductor 1 as in Fi 4. Suitable insulation IV may be provi ed at the ends of the condenser to seal the edges of the alternate layers. The arc gaps protect the condenser from abnormall; high volta e, the voltage jumpiny across t e gaps rat er tlian--puncturing t e condenser. i 1

The voltage the condensers shown in Figs.

manera 4 and 5 can withstand depends upon the number of sections A, B, C, etc. The capacity depends uponthe plate area, which in turn de- -To practice the method illustrated in Figs. 6 and 7 and to make the product illusustrated in Fig. 8, a plurality of rolls of foil and dielectric may be alternately disposed as illustratedin Fig. 7 Each foil roll may comprise a plurality of strips or sections F1, F2

and F3 1n one layer, F4, and F5 inthe next foil layer, F6, F7 and F8 in the next foil layer, F9 and FlO'in the next foil layer, etc. i

The-strips are placed side by side and spaced as illustrated, the spacings `in adjacent foil layers beingstaggered to provide the desired condenser action and series section relation.

The relation of the dielectriclayers Ml, M2.

'M5L etc., and foil layer before windingis illustrated -in'Fig'l 6, the arrows indicating the direction in which tho stack of layers is wound.

A. suitable mandrel'H -may be provided shown in Fig. 7 and the stack wound on a machine similar to that illustrated in Figs. 2 and 3. except that no axial shaft nor any cutting devices is necessary.

After the stack is wound tightly into a roll, the end plates F3, F6, etc., of alternate foil layers are connected at 2 andv soldered or otherwise electrically connected to ring cap 2A. Similarly the end plates ofthe same foil layers F1, F5, etc., are connected together as at l, and electrically connected to another ring cap 1A. If desired, the mandrel H may be removed, leaving an opening HO. Ring caps 1A land 2A having openings aligned with the opening HO 4provide for ample cooling.

It will he noted that the product made by this method is similar in appearance to an ordinary cartridge fuse and may be mounted in clips (not shown) engaging the caps 1A and 2A with all the ease and facility in the case of the ordinary cartridge fuse.

The desired voltage is provided for by the number of sections or strips F1, F2, F3, etc., laid side b side. l The capacity is provided for hy making the strips of suicient area either by changing the length or the width. For high voltages the roll condenser shown in Fig.`8 may be very long and of comparatively small diameter andmay a pear very similar to an ordinary household s ade roller.

It is desirable'that the area of the plates be increasedby providing a larger number-or by making them longer rather than wider in order to minimize theinternal resistance of the condenser.

Thus condensers have been disclosed which and to withstand any volta e. The'methods vemployed may be used to ma te condensers having the above properties very quickly and inexpensively and lends y itself to mass production. The apparatus used is simple and rugged in construction and may be used to aid in performing the above .methods to great advantage.

While certain novel features of the inventionvfhave been shown and described and are pointed out in the annexed claims, it will be understood that various omissions, substitutions and changes iii-the forms and details of the invention as illustrated may be made' by those skilled in the art without departing` fromthe spirit of the invention. f

`What is :claimed is:

l. Apparatus for making condenserscomprising alternately disposed supply rolls for ldielectric and conducting layers, a cutting device foreach conducting layer, alternate cutting devices being arranged to make staggered cuts, a winding mechanism including a mandrel holder, and means for simultaneously rotating and shiftingaxially said man- 2. Apparatus for making condensers comprising alternately disposed supply rolls for dielectric and conducting layers, device for each conducting layer, alternate cutting devices being arranged to make staggered cuts, a winding'mechanism including a mandrel holder, and vmeans for rotating saidm-andrel holder. i

3. Apparat-us for making condensers coma cutting are rugged and compact and can be made of any desired capacity prising a source of dielectric andfconducting `layers, a cutting devicel for each conducting layer, lmeans for feeding said conducting 'layers vthrough said cutting devices and said dielectric layers around said cutting devices, means for causing said dielectric layers to carry theplates into which the conductin layers are cut, and means for winding sai' layers into a roll.

`WVinding mechanism comprising a framework, a splined shaft journalled in said framwork'and having a head stock secured thereto, a yoke loosely placed on said shaft and held in fixed axial relation to said head stock, said yoke carrying a tail stock, said head stock and tail stock being adapted to center a mandrel, a drive pulley and sprocket fixedly journalled in said framework on said shaft, a second sprocket journalled in said' frame, a chain on said sprockets, a drive screw journalled in said frame, gearing connecting said second sprocket and drive screw, a sleeve on said yokesurrounding said drive screw and a spring pressed'threaded mem-i ber mounted onsaid yoke and yieldably held against one side of said screw.

5. Winding mechanism comprising f a framework, a s lined shaft journalled in said 5 framework an having a head stock secured thereto, a yoke loosely placed on said shaft and held in fixed axial relation to said head stock, said yoke carryin a tail stock, said head stock and tail stoc being adapted to lo center a mandrel, a drive wheel andv ixedly ljournalled in said framework on said Shaft, adrive `screw `jonrnalled in said frame, gearing connecting said shaft -and drive screw, and thread means on said yoke engaging said 4 n drive screw.,

f 6l Condenser machine tor making a roll condenser comprising centers, a mandrel on which the condenser is Wound supported by v said centers, means for rotating said mandrel, a feed device for feeding layers of con* denser material to said mandrel, and means for relatively axially shiftin said mandrel Y and feed device as the con ensei' is rolled on said mandrel.

7. A machine for making roll paper condensers of dielectric and foil strips comprising a Winding mandrel, driving mechanism forl the mandrel, and means for relatively shifting the mandrel with respect to the dielectric and foil strips inv timed relation to said driving mechanism to produce a substantially tapered end portion toa condenser when Wound.v

8; A machine-for making roll paper con- '35 densers of dielectric and foil stripscomprising a winding mandrel, driving mechanism for the mandrel, and means for supplying dielectric and foil members to said mandrel in such manner that the foil members are v 40 staggered circumferentially with respect to the ioil members in alternate layers.

9. A machine for making roll paper condensers of dielectric and foil strips comprising a Winding mandrel, driving mechanism for the mandrel, and means for supplying alternate foil members to the mandrel, means for cutting the foils transverselyY before Winding them and carrying the foils to the mandrel on the dielectric members as a con- 59 veyor.

In testimony whereof I hereunto'aix my signature.`

GREENLEAF WHITTIER PICKARD. 

